Teigen's tweet came after the supermodel wrote a simple "nope" at the start of Trump's inauguration, and then mocked the ceremony. "What a beautiful prayer. makes me wanna grab my p---," the outspoken Hollywood star wrote, referencing the leaked 2005 conversation Trump had with Billy Bush in which the now-President joked about grabbing women by the "p----."

When asked by a fan what her sign for the march would say, Teigen responded that she was still mulling it over. "Haven't thought about it. i've never done this before," she wrote. "Need to go to walgreens stat."

It's estimated that more than 200,000 women will be in D.C. for the Women's March, including celebrities Samantha Bee, Jessica Chastain, America Ferrera, Amy Schumer, Debra Messing and Olivia Wilde.

Following Donald Trump’s inauguration, thousands of women will attend a protest in Washington, D.C. (Andrew Harnik/AP)

Katy Perry also announced she would be marching, telling fans in a tweet Friday that she was "sleeping in" for Trump's inauguration. "Then, I'm marching. #WomensMarch," the singer wrote.

Another famous face who will be at the march is actress Scarlett Johannsson, who said in a statement that she was attending because the new administration has made it very clear "their intentions of reducing the availability of a woman's healthcare and attacking her reproductive rights."